What you appear to be looking at is the World Voyageur, which was Schwinn's first imported lightweight 10 speed, and is probably worth every penny of $180. The chrome lugs are the giveaway. It was only sold in 1973 (I think) and was nearly the best bike in their line-up--- just short of the Paramounts. The FD and the RD appear to be replacements, but the rest looks to be stock.
Here is the cut and paste description from Bob Hufford's notebook.
http://www.velobration.com/sldataboo...7074.html#1973
10 speed. Built for Schwinn by Panasonic. 4130 chrome-moly steel frame tubing. Chrome plated head lugs, fork crown and front and rear fork ends. Schwinn Approved (Sun Tour power rachet) fingertip shifters. Diacompe center-pull brakes with dual-position quick release levers. Quick-release high flange aluminum hubs (Shimano) and alloy rims. Shimano "Dura-Ace" three piece cotterless aluminum crank set. Steel rattrap KKT pedals. Shimano "Crane GS" (sometimes known as a Schwinn-Approved GT-300 Le Tour) wide range derailleur and "Titlist" front changer. Seamless, leather covered nylon saddle (Unica-Nitor) -- sometimes Brooks B-15 leather saddle. SR two-bolt seat post. Diacompe stem, unmarked randonneur bars. Tange headset. Schwinn Approved "Le Tour" high-pressure tires. Round "World" head badge. Colors were Opaque Blue, Kool Orange, and Kool Lemon. Frame sizes 21", 23". Net weight 27.5 lbs (21"), 28 lbs (23"). Shipping weight 38 lbs. and 39 lbs. $275.00.
